v2.4.0.6

Summary of Significant Accounting Policies (Promotional Allowances) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Allowances [Line Items]
Promotional allowances	$ 111,923	$ 110,626
Cost of promotional allowances	64,896	65,484
Rooms
Allowances [Line Items]
Promotional allowances	35,120	34,682
Cost of promotional allowances	14,711	14,827
Food and Beverage
Allowances [Line Items]
Promotional allowances	50,788	48,298
Cost of promotional allowances	45,059	44,851
Other Products and Services
Allowances [Line Items]
Promotional allowances	26,015	27,646
Cost of promotional allowances	$ 5,126	$ 5,806

X

- Details

Name:	byd_AllowancesLineItems
Namespace Prefix:	byd_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cost of Promotional Allowances

+ References

No definition available.

+ Details

Name:	byd_CostOfPromotionalAllowances
Namespace Prefix:	byd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

This element represents the estimated retail value of accommodations, food and beverage, and other services furnished to guests without charge.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 924

-SubTopic 605

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6472957&loc=d3e51325-107943

+ Details

Name:	us-gaap_PromotionalAllowances
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration